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Shaded-relief map of Grizzly Flats, California: rivers, roads, the city limits and where the water drains.
CALIFORNIA · EL DORADO COUNTY

Grizzly Flats

1,093 people, 3,870 ft above sea level in El Dorado County.

3,870 ftElevation, city center
1,093People, 2024 estimate
7 sq miLand area
Sunny 55°
Sunny now Dew point 39° · Calm · high 57°
City of Grizzly Flats River Interstate 2 miles
Explore the plate Order a print

The Grizzly Flats plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.

MILE1
TODAY

Today in Grizzly Flats

NWS forecast and National Blend of Models · updated 12:00 PM PST
RIGHT NOW Placerville Airport (KPVF) · 12:55 PM
Sunny
55° Sunny Feels like 55° · high of 57° near 1 PM
WindCalmno gusts
Humidity54%falling to 55% this afternoon
Pressure30.00 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 39° · Dry31° by Tuesday: drier air arrives
DryComfortableStickyMuggyOppressive
NEXT RAIN
Rain
Tomorrow, about 5 PMin about 28 hours · 82% chance · showers
LIKELY AMOUNT0.2–1.8 inmost likely 1.4; 1 in 10 over 2.1
LAST RAINNov. 40.16 in · 10 dry days
ALERTS & OUTLOOKS
! Winter Weather AdvisoryWinter Weather Advisory issued November 14 at 10:55AM PST until November 16 at 10:00PM PST by NWS Sacramento CA
! Winter Weather AdvisoryWinter Weather Advisory issued November 14 at 10:51AM PST until November 16 at 7:00PM PST by NWS Reno NV
NWS Sacramento and the Storm Prediction Center · checked 1:15 PM
SUN & MOON
↑ 6:43 AM4:50 PM ↓
10 h 6 m of daylight, 2 minutes less than yesterday
Waxing crescent, 25% lit. Next full moon: Nov. 24.
AIR & POLLEN
23
GOODAir quality index · ozone
No pollen source yet.

The next three days, hour by hour

Sky: clear, cloudy, night Rain likely National Blend of Models
SATURDAY, NOV. 14
SUNDAY, NOV. 15
MONDAY, NOV. 16
TUESDAY, NOV. 17
1p
4p
7p
10p
1a
4a
7a
10a
1p
4p
7p
10p
1a
4a
7a
10a
1p
4p
7p
10p
1a
4a
7a
10a
partly cloudy day
mostly cloudy night
mostly cloudy night
mostly cloudy night
partly cloudy night
mostly cloudy night
partly cloudy day
partly cloudy day
mostly cloudy day
rain
rain
rain
rain
rain
rain
rain
showers day
mostly clear night
mostly clear night
partly cloudy night
partly cloudy night
mostly clear night
mostly sunny
mostly sunny
TEMPERATURE °F
57°
45°
57°
45°
50°
36°
CHANCE OF RAIN
82% · 1.08 in Monday morning 50%
WIND, MPH
3
1
3
2
2
3
3
6
5
5
4
2
0
0
2
3
3
2
2
1
2
3
3
1
HOW IT FEELS · DEW POINT
Dry: dew points 31 to 47°

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 80° / 62°
SAT Nov. 14 Partly cloudy Partly cloudy
57° 41°
0% rain — SW 3 A
SUN Nov. 15 Showers likely Showers likely
57° 43°
80% rain 0.2–1.8″ S 5 B
MON Nov. 16 Showers likely Showers likely
50° 34°
80% rain 0.06–1.6″ S 2 B
TUE Nov. 17 Mostly sunny Mostly sunny
50° 37°
20% rain — SW 2 B
WED Nov. 18 Showers likely Showers likely
46° 38°
100% rain 1.8–2.5″ SSE 10, gusts 36 B
THU Nov. 19 Showers likely Showers likely
47° 36°
80% rain 0.3–2.1″ SSE 5 B
FRI Nov. 20 Chance of showers Chance of showers
51° 35°
40% rain up to 0.1″ SW 2 C
How sure are we? AModels agree: highs within 4° BSome spread: within 8° CWide spread: check back
Range from the National Blend of Models percentiles · graded on Forecast Scores
AIR MAIL

Where today’s air came from

The air arriving over Grizzly Flats about 5,000 feet above the ground was over the California coast three days ago, about 320 miles back along its path. The nine paths traced from around the city fan out, so treat that as a best guess. Near the ground the air came from southern California; at 10,000 feet, from the California coast. It has stayed over land, which is why it feels dry. Traced back 72 hours through NOAA’s hourly RAP analyses, nine paths at each of three heights.

MILE2
THE GROUND

What Grizzly Flats stands on

Grizzly Flats’s center stands about 3,870 ft above sea level. Within three miles the land runs from 2,760 ft to 4,670 ft, a difference of 1,910 ft: steep hill country. The highest named summit within 15 miles is Leek Spring Hill, about 7,620 ft, 14 miles east.

Under the town center the state geologic map shows Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada) (argillite, quartzite, phyllite), from the Ordovician to Triassic, 202 to 487 million years old.

The section below crosses 3 rock units mapped at the surface.

Grizzly Flats, cut in half from west to east

A section west to east, 24 miles through the town center
2,000 ft4,000 ft GRIZZLY FLATS3,870 ftNorth Fork Cosumnes Riverabout 1,200 ftSteely Fork Cosumnes Riverabout 2,730 ftHigh point of the line5,960 ft ← WE →

Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 4×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.

Rock at the surface along the line

Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges)

Granodiorite. Age: Permian to Tertiary, 2.6 to 260 million years old. About 12 mi of the line.

Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range)

Andesite. Age: Late Oligocene to Pleistocene, 2 to 24 million years old. About 9 mi of the line.

Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada)

Argillite, quartzite, phyllite. Age: Ordovician to Triassic, 202 to 487 million years old. About 3 mi of the line.

From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.

Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
MILE3
THE WATER

Where Grizzly Flats’s rain goes

A raindrop that lands in Grizzly Flats reaches San Francisco Bay and the Pacific Ocean by way of the North Fork Cosumnes, the Cosumnes, the Mokelumne, the South Mokelumne, the San Joaquin and New York Slough: about 130 river miles.

THE WAY DOWN, TO SCALE
Grizzly Flats≈ 130 mi · San Francisco Bay and the Pacific Ocean
FROM THE CENTER OF GRIZZLY FLATS ≈ 130 mi to San Francisco Bay and the Pacific Ocean North Fork Cosumnes → Cosumnes → Mokelumne → South Mokelumne → San Joaquin → New York Slough

50 miles of the trip are on the Cosumnes.

Traced down the USGS NHDPlus V2.1 river network from the Census center point of Grizzly Flats; river miles along the main stem, rounded.

MILE7
ON THE NETWORK

Around Grizzly Flats on the Forecast Network

Neighboring plates

Folsom CA · 33 MI 33 miles west Rancho Cordova CA · 38 MI 38 miles west Sacramento CA · 51 MI 51 miles west Oakland CA · 110 MI 110 miles southwest San Jose CA · 116 MI 116 miles southwest Fresno CA · 134 MI 134 miles south
FORECASTCITY
Map of Grizzly Flats, California. Explore the plate
CALIFORNIA · EL DORADO

Grizzly Flats

1,093 people, 3,870 ft above sea level in El Dorado County.

3,870 ftElevation
1,093People
7 sq miLand
Sunny 55°
SunnyDew point 39°
1

Today in Grizzly Flats

NEXT 15 HOURS
Now mostly sunny 57° 0%
4p partly cloudy day 53° 0%
7p mostly cloudy night 46° 0%
10p mostly cloudy night 45° 0%
1a partly cloudy night 45° 0%
4a mostly cloudy night 45° 2%
Rain
NEXT RAINTomorrow about 5 PM · 82%
→
Sat0%
Partly cloudy Partly cloudy
41
57
A
Sun80%
Showers likely Showers likely
43
57
B
Mon80%
Showers likely Showers likely
34
50
B
Tue20%
Mostly sunny Mostly sunny
37
50
B
Wed100%
Showers likely Showers likely
38
46
B
Thu80%
Showers likely Showers likely
36
47
B
Fri40%
Chance of showers Chance of showers
35
51
C
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
2

What Grizzly Flats stands on

Grizzly Flats’s center stands about 3,870 ft above sea level. Within three miles the land runs from 2,760 ft to 4,670 ft, a difference of 1,910 ft: steep hill country. The highest named summit within 15 miles is Leek Spring Hill, about 7,620 ft, 14 miles east.

Grizzly Flats, west to east Grizzly Flats3,870 ftNorth Fork Cosumnes Riverabout 1,200 ft ← WE → 24 miles through the town center; vertical exaggeration about 8×. Colors: rock at the surface.
Elevation, center3,870 ft
Within 3 miles2,760 to 4,670 ft
Lie of the landSteep hill country (1,910 ft of relief)
High point nearbyLeek Spring Hill, 7,620 ft, 14 mi east
Rock at the surfacePaleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada)
Its ageOrdovician to Triassic, 202 to 487 million years old
3

Where the rain goes

≈ 130 mito the PacificNorth Fork Cosumnes → Cosumnes → Mokelumne → South Mokelumne → San Joaquin → New York Slough

A raindrop that lands in Grizzly Flats reaches San Francisco Bay and the Pacific Ocean by way of the North Fork Cosumnes, the Cosumnes, the Mokelumne, the South Mokelumne, the San Joaquin and New York Slough: about 130 river miles.

50 miles of the trip are on the Cosumnes.